One atom of carbon, two of oxygen.
P2o5
Cr3Si2 is the empirical formula for a compound containing chromium and silicon an has 73.52 mass percent chromium.
S2o3
MgO
CaSO4
Percent composition can be used to calculate the percentage of an element/compound in a mixture. From the percent composition, you can also find the empirical formula. And from the empirical formula you can find the actual molecular weight.
If it tells you to find the empirical formula when percent composition is given or if the mass of each element is given in a specific compound.
Not completely. The empirical formula of a substance can be determined from its percent composition, but a determination of molecular weight is needed to decide which multiple of the empirical formula represents the molecular formula.
Chi a+
P2o5
Cr3Si2 is the empirical formula for a compound containing chromium and silicon an has 73.52 mass percent chromium.
CHI3
C3 h3o
p2o5
KCl
S2o3
MgO